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1. 发明授权

US07853152B2 Signal regeneration device, optical receiver, and signal processing method 有权
标题翻译：信号再生装置，光接收机和信号处理方法
公开(公告)号：US07853152B2
公开(公告)日：2010-12-14
申请号：US11387936
申请日：2006-03-24
申请人： Masato Nishihara , Tomoo Takahara , George Ishikawa
发明人： Masato Nishihara , Tomoo Takahara , George Ishikawa
IPC分类号： H04B10/02
CPC分类号： H04B10/66 , H04L25/03159 , H04L2025/03522
摘要： A signal regeneration device which makes an extracted clock signal highly accurate while maintaining superior receiving sensitivity. To this end, a device of the present invention is configured to have a branch section for branching an input electrical signal which has been demodulated from a differential phase-shift modulated state; a first filter for equalizing a waveform of one of the demodulated electrical signals branched by the branch section; a clock recovery section for recovering a clock signal from the demodulated electrical signal whose waveform has been equalized by the first filter; and a data regeneration section for regenerating a data signal from a remaining one of the demodulated electrical signals branched by the branch section and from a clock signal recovered by the clock recovery section.
摘要翻译：一种信号再生装置，其使得提取的时钟信号高度准确，同时保持优异的接收灵敏度。为此，本发明的装置被配置为具有分支部分，用于对已经从差分相移调制状态解调的输入电信号进行分支; 第一滤波器，用于对由分支部分分支的解调电信号之一的波形进行均衡; 时钟恢复部分，用于从已被第一滤波器均衡的解调电信号中恢复时钟信号; 以及数据再生部分，用于从由分支部分分支的解调电信号中的剩余的一个信号和由时钟恢复部分恢复的时钟信号再生数据信号。

2. 发明申请

US20070127929A1 Signal regeneration device, optical receiver, and signal processing method 有权
标题翻译：信号再生装置，光接收机和信号处理方法
公开(公告)号：US20070127929A1
公开(公告)日：2007-06-07
申请号：US11387936
申请日：2006-03-24
申请人： Masato Nishihara , Tomoo Takahara , George Ishikawa
发明人： Masato Nishihara , Tomoo Takahara , George Ishikawa
IPC分类号： H04B10/00
CPC分类号： H04B10/66 , H04L25/03159 , H04L2025/03522
摘要： A signal regeneration device which makes an extracted clock signal highly accurate while maintaining superior receiving sensitivity. To this end, a device of the present invention is configured to have a branch section for branching an input electrical signal which has been demodulated from a differential phase-shift modulated state; a first filter for equalizing a waveform of one of the demodulated electrical signals branched by the branch section; a clock recovery section for recovering a clock signal from the demodulated electrical signal whose waveform has been equalized by the first filter; and a data regeneration section for regenerating a data signal from a remaining one of the demodulated electrical signals branched by the branch section and from a clock signal recovered by the clock recovery section.
摘要翻译：一种信号再生装置，其使得提取的时钟信号高度准确，同时保持优异的接收灵敏度。为此，本发明的装置被配置为具有分支部分，用于对已经从差分相移调制状态解调的输入电信号进行分支; 第一滤波器，用于对由分支部分分支的解调电信号之一的波形进行均衡; 时钟恢复部分，用于从已被第一滤波器均衡的解调电信号中恢复时钟信号; 以及数据再生部分，用于从由分支部分分支的解调电信号中的剩余的一个信号和由时钟恢复部分恢复的时钟信号再生数据信号。

3. 发明授权

US08666252B2 Optical network system 有权
标题翻译：光网络系统
公开(公告)号：US08666252B2
公开(公告)日：2014-03-04
申请号：US13420043
申请日：2012-03-14
申请人： Masato Nishihara , Tomoo Takahara , Toshiki Tanaka
发明人： Masato Nishihara , Tomoo Takahara , Toshiki Tanaka
IPC分类号： H04B10/00
CPC分类号： H04J14/0257 , H04J14/0204 , H04J14/0212 , H04J14/0213 , H04J14/0221 , H04J14/0256 , H04J14/0283
摘要： There is provided an optical network system in which optical signals modulated by each of at least two modulation methods are wavelength-division-multiplexed and transferred, including: an optical transmitter configured to transmit first optical signals modulated by each of at least two modulation methods; an add-drop multiplexer configured to drop second optical signals from wavelength-division-multiplexed optical signals transferred in the optical network system, and add the first optical signals to the wavelength-division-multiplexed optical signals; an optical receiver configured to demodulate the second optical signals corresponding to each of at least two modulation methods; and a controller configured to control wavelengths of the first optical signals, the second optical signals and the wavelength-division-multiplexed optical signals so as to rearrange wavelengths of the first optical signals, the second optical signals and the wavelength-division-multiplexed optical signals so that optical signals modulated by a same modulation method are placed on an adjacent wavelength.
摘要翻译：提供了一种光网络系统，其中由至少两种调制方法中的每一种调制的光信号被波分复用和传送，包括：光发射机，被配置为发送由至少两种调制方法中的每一种调制的第一光信号; 一种分插复用器，被配置为从光网络系统中传输的波分复用光信号中丢弃第二光信号，并将第一光信号加到波分复用光信号上; 光接收机，被配置为解调对应于至少两种调制方法中的每一种的第二光信号; 以及控制器，被配置为控制第一光信号的波长，第二光信号和波分复用光信号，以便重新排列第一光信号的波长，第二光信号和波分复用光信号使得通过相同调制方法调制的光信号被放置在相邻的波长上。

4. 发明授权

US08693891B2 Optical modulation apparatus and optical modulation method 有权
标题翻译：光调制装置及光调制方式
公开(公告)号：US08693891B2
公开(公告)日：2014-04-08
申请号：US13048150
申请日：2011-03-15
申请人： Masato Nishihara , Tomoo Takahara , Takeshi Hoshida
发明人： Masato Nishihara , Tomoo Takahara , Takeshi Hoshida
IPC分类号： H04J14/06 , H04B10/04 , H04B10/00
CPC分类号： H04B10/505 , H04B10/5162
摘要： An optical modulation apparatus includes a first modulator, a second modulator, a multiplexer, a calculator and an adjustor. The first modulator configured to modulate light emitted by a light source using a first input signal and output a first modulated signal. The second modulator configured to modulate the light using a second input signal and output a second modulated signal. The multiplexer configured to multiplex the first and second modulated signals and output a multiplexed signal. The calculator configured to calculate a power difference between a higher-side frequency component having a frequency higher than a center frequency of the multiplexed signal and a lower-side frequency component having a frequency lower than the center frequency. The adjustor configured to adjust delays of the first and second input signals based on the power.
摘要翻译：光调制装置包括第一调制器，第二调制器，多路复用器，计算器和调节器。第一调制器被配置为使用第一输入信号调制由光源发射的光并输出第一调制信号。第二调制器被配置为使用第二输入信号调制光并输出第二调制信号。复用器被配置为复用第一和第二调制信号并输出多路复用信号。所述计算器被配置为计算频率高于所述多路复用信号的中心频率的较高侧频率分量与具有低于所述中心频率的频率的下侧频率分量之间的功率差。调整器被配置为基于功率来调整第一和第二输入信号的延迟。

5. 发明授权

US08301039B2 Delay processing apparatus, signal amplification apparatus, opto-electric conversion apparatus, analog-digital conversion apparatus, receiving apparatus, and receiving method 有权
标题翻译：延迟处理装置，信号放大装置，光电转换装置，模拟数字转换装置，接收装置和接收方法
公开(公告)号：US08301039B2
公开(公告)日：2012-10-30
申请号：US12620540
申请日：2009-11-17
申请人： Masato Nishihara , Tomoo Takahara , Hisao Nakashima
发明人： Masato Nishihara , Tomoo Takahara , Hisao Nakashima
IPC分类号： H04B10/06
CPC分类号： H04B10/614 , H04B10/61 , H04B10/613 , H04B10/6165
摘要： A delay device that provides a delay amount to at least one of the in-phase signal and the quadrature signal, and a delay control section that controls the delay amount provided by the delay device based on a quality of the signals when the in-phase signal and the quadrature signal, to the at least one of which the delay amount is provided, at the delay device are converted into digital signals by the analog-digital converter, and the digital signal processing is carried out at the processor are provided. Thereby, the signal quality of recovered data at a receiving end of a multi-level phase modulation communication system is improved.
摘要翻译：一种向至少一个同相信号和正交信号提供延迟量的延迟装置，以及延迟控制部分，当延迟装置根据同相信号和正交信号中的信号质量，信号和正交信号至延迟装置中提供的延迟量中的至少一个被模拟数字转换器转换成数字信号，并且在处理器处执行数字信号处理。因此，提高了在多级相位调制通信系统的接收端的恢复数据的信号质量。

6. 发明申请

US20120148235A1 CONTROL CIRCUIT, COMMUNICATION SYSTEM, AND CONTROL METHOD 审中-公开
标题翻译：控制电路，通信系统和控制方法
公开(公告)号：US20120148235A1
公开(公告)日：2012-06-14
申请号：US13315560
申请日：2011-12-09
申请人： Masato Nishihara , Tomoo Takahara , Toshiki Tanaka
发明人： Masato Nishihara , Tomoo Takahara , Toshiki Tanaka
IPC分类号： H04B10/00 , H04J14/02 , H04B10/06 , H04B10/08
CPC分类号： H04B10/07951 , H04B10/572 , H04B10/612 , H04B10/613 , H04B10/614 , H04B10/615 , H04B10/616 , H04B10/6161 , H04J14/0212 , H04J14/0256 , H04J14/0271 , H04J14/0279
摘要： A communication system includes a transmitter, a receiver device, and a control circuit. The transmitter transmits an optical signal. The receiver device receives the optical signal. The control circuit reduces a power consumption of the receiver device based on an accumulated chromatic dispersion of the received optical signal. The receiver device includes a receiver, an analog/digital converter, and a digital signal processor. The receiver extracts a signal indicating a complex amplitude of the optical signal. The analog/digital converter converts the signal indicating the complex amplitude into a digital signal. The digital signal processor digitally-processes the digital signal.
摘要翻译：通信系统包括发射机，接收机设备和控制电路。发射机发射光信号。接收机设备接收光信号。控制电路基于所接收的光信号的累积色散来降低接收机设备的功耗。接收机设备包括接收机，模拟/数字转换器和数字信号处理器。接收机提取表示光信号的复振幅的信号。模拟/数字转换器将指示复振幅的信号转换为数字信号。数字信号处理器对数字信号进行数字处理。

7. 发明申请

US20100178065A1 DELAY PROCESSING APPARATUS, SIGNAL AMPLIFICATION APPARATUS, OPTO-ELECTRIC CONVERSION APPARATUS, ANALOG-DIGITAL CONVERSION APPARATUS, RECEIVING APPARATUS, AND RECEIVING METHOD 有权
标题翻译：延迟处理装置，信号放大装置，光电转换装置，模拟数字转换装置，接收装置和接收方法
公开(公告)号：US20100178065A1
公开(公告)日：2010-07-15
申请号：US12620540
申请日：2009-11-17
申请人： Masato Nishihara , Tomoo Takahara , Hisao Nakahima
发明人： Masato Nishihara , Tomoo Takahara , Hisao Nakahima
IPC分类号： H04B10/06 , H03M1/12
CPC分类号： H04B10/614 , H04B10/61 , H04B10/613 , H04B10/6165
摘要： A delay device that provides a delay amount to at least one of the in-phase signal and the quadrature signal, and a delay control section that controls the delay amount provided by the delay device based on a quality of the signals when the in-phase signal and the quadrature signal, to the at least one of which the delay amount is provided, at the delay device are converted into digital signals by the analog-digital converter, and the digital signal processing is carried out at the processor are provided. Thereby, the signal quality of recovered data at a receiving end of a multi-level phase modulation communication system is improved.
摘要翻译：一种向至少一个同相信号和正交信号提供延迟量的延迟装置，以及延迟控制部分，当延迟装置根据同相信号和正交信号中的信号质量，信号和正交信号至延迟装置中提供的延迟量中的至少一个被模拟数字转换器转换成数字信号，并且在处理器处执行数字信号处理。因此，提高了在多级相位调制通信系统的接收端的恢复数据的信号质量。

8. 发明授权

US08611760B2 Optical modulation device and optical modulation method 有权
标题翻译：光调制装置及光调制方式
公开(公告)号：US08611760B2
公开(公告)日：2013-12-17
申请号：US12394729
申请日：2009-02-27
申请人： Masato Nishihara , Tomoo Takahara
发明人： Masato Nishihara , Tomoo Takahara
IPC分类号： H04B10/00 , H04B10/50
CPC分类号： H04B10/50577 , H04B10/5051 , H04B10/5053 , H04B10/58
摘要： An optical modulation device and method thereof is provided. The optical modulation device includes a decision circuit making a decision with respect to an input data signal in accordance with a timing of a first clock signal, a first modulator modulating light output based on the data signal by the decision circuit; a second modulator modulating the modulated light in accordance with a timing of a second clock signal; and delay controller delaying the first clock signal within a range of a phase margin of a decision circuit, and delaying the second clock signal, thereby controlling a state of a phase difference between the data signal and the second clock signal.
摘要翻译：提供了一种光调制装置及其方法。光调制装置包括：判定电路，根据第一时钟信号的定时，对输入数据信号进行判定，第一调制器，根据判定电路调制基于数据信号的光输出; 根据第二时钟信号的定时调制调制光的第二调制器; 延迟控制器在判定电路的相位裕度的范围内延迟第一时钟信号，并延迟第二时钟信号，从而控制数据信号与第二时钟信号之间的相位差的状态。

9. 发明授权

US08582980B2 Optical device and optical modulation method 有权
标题翻译：光器件和光调制方法
公开(公告)号：US08582980B2
公开(公告)日：2013-11-12
申请号：US12013708
申请日：2008-01-14
申请人： Masato Nishihara , Tomoo Takahara , Yuichi Akiyama , Masahiro Yuki
发明人： Masato Nishihara , Tomoo Takahara , Yuichi Akiyama , Masahiro Yuki
IPC分类号： H04B10/04
CPC分类号： H04B10/548 , H04B10/5162
摘要： The disclosed device and method include varying phases of two data signals at a first predetermined frequency, performing multi-level phase modulation of a light based on the two data signals whose phases are varied at the first predetermined frequency, extracting a component having the first predetermined frequency from an optical signal subjected to the phase modulation, and controlling the phases of the two data signals based on the component extracted from the optical signal.
摘要翻译：所公开的设备和方法包括以第一预定频率改变两个数据信号的相位，基于相位以第一预定频率变化的两个数据信号执行光的多电平相位调制，提取具有第一预定频率的分量来自经过相位调制的光信号的频率，并且基于从光信号提取的分量来控制两个数据信号的相位。

10. 发明授权

US08565615B2 Optical modulation apparatus and optical modulation method 有权
标题翻译：光调制装置及光调制方式
公开(公告)号：US08565615B2
公开(公告)日：2013-10-22
申请号：US13048148
申请日：2011-03-15
申请人： Masato Nishihara , Tomoo Takahara , Takeshi Hoshida
发明人： Masato Nishihara , Tomoo Takahara , Takeshi Hoshida
IPC分类号： H04B10/04 , H04B17/00 , H04J14/02
CPC分类号： H04B10/50572 , H04B10/5053 , H04B10/50575 , H04B10/5561
摘要： An optical modulation apparatus includes a first modulator, a second modulator, a multiplexer, a detector and an adjustor. The first modulator modulates light emitted by a light source using a first input signal and outputs a first modulated signal. The second modulator modulates the light using a second input signal and outputs a second modulated signal. The multiplexer multiplexes the first and second modulated signals and outputs a multiplexed signal. The detector is configured to detect a dip where power in a waveform of the multiplexed signal is equal to or smaller than a predetermined value. The adjustor is configured to adjust a delay of the first and second input signals based on power at the dip.
摘要翻译：光调制装置包括第一调制器，第二调制器，多路复用器，检测器和调节器。第一调制器使用第一输入信号调制由光源发射的光，并输出第一调制信号。第二调制器使用第二输入信号调制光并输出第二调制信号。复用器复用第一和第二调制信号并输出多路复用信号。检测器被配置为检测多路复用信号的波形中的功率等于或小于预定值的下降。调整器被配置为基于倾角处的功率来调整第一和第二输入信号的延迟。

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